This study just proves what I've always known-- Doodling is good for you.
I've always found that I can reconstruct and entire lecture AND my side-thoughts from a good page of doodles.
And, when I'm at my non-sleep deprived best, I don't even have to look back at my doodles to remember.
Though I've also found that on days when I doodle a lot, I have no mental energy left for writing. Hmmmm......